Phone-type is a major feature of Veriphone, it tells if a number is mobile, fixed line, VoIP, Toll Free, etc.
Veriphone relies on government provided data rather than carrier data. US Canada and Puerto Rico share the same phone system where government authorities approve number ranges for use by carriers but do not pre-assign those numbers to line types. It rather leaves it to carriers to decide which number is mobile and which is land line. This scheme is unique to these three countries. All other countries pre-assign number types, separating numbers ranges of line types at country level.
Veriphone uses governement data only. We do not rely on carrier data for two reasons: